Journal of Rehabilitation Research & Development (JRRD)

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Volume 50 Number 10, 2013
   Pages 1391 — 1400

Abstract — Influence of standardized activities on validity of Assessment of Capacity for Myoelectric Control

Helen Y. N. Lindner, MSc;1–2* Ann-Christin Eliasson, PhD;3 Liselotte M. N. Hermansson, PhD1,4

1School of Health and Medical Sciences and 2Centre for Rehabilitation Research, Örebro University Hospital, Örebro, Sweden; 3Department of Women's and Children's Health, Karolinska Institute, Stockholm, Sweden; 4Department of Prosthetics and Orthotics, Örebro University Hospital, Örebro, Sweden

Abstract — The Assessment of Capacity for Myoelectric Control (ACMC) is an observation-based clinical tool that evaluates ability to control a myoelectric prosthetic hand during bimanual activities. Two validity aspects were investigated: potential bias interaction between prosthesis users and activities performed during assessment, and potential bias interaction between activities and different user characteristics (sex or prosthetic side). Six activities were standardized for the ACMC. Upper-limb myoelectric prosthesis users (47 congenital, 11 acquired; 31 male, 27 female, average age 19.9 yr) performed three standardized activities, each on one occasion. Bias-interaction analysis in the many-facet Rasch model identified inconsistent patterns in the interactions of individual users and activity facets and between activities and user characteristics. The standardized activities had no significant influence on measures of user ability. The activities functioned similarly across both sexes (p-value greater than or equal to 0.12) and across both prosthetic sides in persons with upper-limb reduction deficiency (p-value greater than or equal to 0.50) and persons with acquired amputation (p-value greater than or equal to 0.13). The results provide evidence for the validity of the ACMC across the standardized activities and support use of the ACMC in prosthesis users of both sexes and prosthetic sides. The newly standardized activities are recommended for future ACMC use.

Key words: activities, amputation, assessment, bimanual, instrument validation, myoelectric control, prostheses, rehabilitation, upper-limb reduction deficiency, upper limb.


View HTML  ¦  View PDF  ¦  Contents Vol. 50, No. 10
This article and any supplementary material should be cited as follows:
Lindner HY, Eliasson AC, Hermansson LM. Influence of standardized activities on validity of Assessment of Capacity for Myoelectric Control. J Rehabil Res Dev. 2013; 50(10):1391–1400.
http://dx.doi.org/10.1682/JRRD.2012.12.0231
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